Superior Cycling Performance of Sulfurized Polyacrylonitrile Cathode Assembled with In Situ Polymerized Gel Polymer Electrolyte

Sulfurized polyacrylonitrile was well known for its excellent electrochemical performance. In this work, a kind of gel polymer electrolyte with PMMA as polymer matrix was prepared through in situ thermal initiated polymerization in this work. The interactions between polymer and traditional carbonate electrolyte were studied by IR. Its electrochemical performance in Li/SPAN batteries was investigated in detail, using LSV, CV, EIS et al. The results show that high ionic conductivity was achieved, with a value of 4.2 mS cm-1 at 30◦C when the content of PMMA was 15%. A reversible capacity of 975.3 mAh g-1 could be maintained after 50 cycles.